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Mathematics 91 Online
OpenStudy (anonymous):

I need help with simplifying fraction expressions

OpenStudy (anonymous):

hey what do you need help with in particular?

OpenStudy (anonymous):

whats the problem?

OpenStudy (anonymous):

my aunt told me how to do it, but the teacher says it is wrong and when I asked someone else they got same answer as my aunt

OpenStudy (anonymous):

i do not understand how to multiply and divide fractions

OpenStudy (anonymous):

umm how did ur aunt do it?

OpenStudy (anonymous):

adding n suctracting them she would find common denominators and then simplify but my teacher says my aunt is wrong

OpenStudy (anonymous):

ah ok, well, multiplying is pretty easy: you just multiple the top number of each fraction and the bottom number of each fraction

OpenStudy (anonymous):

like this problem 5 3/4 divided by 1 2/3

OpenStudy (sandra):

ah ok, so for that problem you can convert it to a non-mixed fraction

OpenStudy (anonymous):

let me re write that one 5 3/4 \[\div\] 1 2/3

OpenStudy (sandra):

so 5 3/4 means 5 whole parts of 4 (20) + 3 parts of 4

OpenStudy (sandra):

that is, 20/4 (since 20/4 is 5) + 3/4 = 23/4

OpenStudy (anonymous):

how do I do that?

OpenStudy (sandra):

1 2/3 is saying "I have one set of 3's, and then 2 more"

OpenStudy (sandra):

so that means I have 1*3/3 + 2/3 = 5/3

OpenStudy (sandra):

now when you divide fractions, it's the same thing as multiplying by 1/(originalfraction), which basically means you multiply by the inverse of the fraction by flipping the top and bottom

OpenStudy (anonymous):

oh ok see my teacher does not explain it that thorough

OpenStudy (sandra):

so 23/4 divided by 5/3 = 23/4 * 3/5 (I just flipped the 5 and the 3) = (23*3)/(5*4) = 69/20

OpenStudy (sandra):

and that is the answer

OpenStudy (anonymous):

i get it know i did be for i get it even better know lol

OpenStudy (anonymous):

i was just waching

OpenStudy (sandra):

great! keep in mind you can always check with your calculator that you got the right answer

OpenStudy (anonymous):

ty sandra.....

OpenStudy (sandra):

np! good luck!

OpenStudy (anonymous):

ty and i will definitly come back here for help

OpenStudy (sandra):

great will see you around =)

OpenStudy (anonymous):

definitely

OpenStudy (anonymous):

hi can u help me i am trying to help some won but i am not sure

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